. >> susie: president obama made the case today for a sweeping immigration reform, calling it a "boost" for the economy. by giving illegal immigrants a path to citizenship, the president said there would be less opportunity for some employers to undercut companies that follow the rules. darren gersh reports. >> reporter: the president flew to las vegas today to make that case that immigration reform would help companies and workers who follow the law. with 11 million undocumented workers in the country, the president said some employers are tempted to pay less than minimum wage or cheat their workers out of overtime pay. >> if we are truly committed to strengthening our middle class and providing more ladders of opportunity to those who are willing to work hard to make it into the middle class, we have to fix the system. we have to make sure that every business and every worker in america is playing by the same set of rules. we have to bring this shadow economy into the light. >> reporter: critics of the president's plan to give legal status to undocumented workers say they've heard th